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ControlLogix Redundancy System User Manual

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ControlLogix Redundancy SystemCatalog Numbers 1756-CNB/D/E, 1756-CNBR/D/E, 1756-ENBT, 1756-EWEB, 1756-L55, 1756-L55M12, 1756-L55M13, 1756-L55M14, 1756-L55M16, 1756-L55M22, 1756-L55M23, 1756-L55M24, 1756-L61, 1756-L62, 1756-L63, 1757-SRMUser ManualImportant User InformationSolid state equipment has operational characteristics differing from those of electromechanical equipment. Safety Guidelines for the Application, Installation and Maintenance of Solid State Controls (publication SGI-1.1 available from your local Rockwell Automation sales office or online at http://literature.rockwellautomation.com) describes some important differences between solid state equipment and hard-wired electromechanical devices. Because of this difference, and also because of the wide variety of uses for solid state equipment, all persons responsible for applying this equipment must satisfy themselves that each intended application of this equipment is acceptable.In no event will Rockwell Automation, Inc. be responsible or liable for indirect or consequential damages resulting from the use or application of this equipment.The examples and diagrams in this manual are included solely for illustrative purposes. Because of the many variables and requirements associated with any particular installation, Rockwell Automation, Inc. cannot assume responsibility or liability for actual use based on the examples and diagrams.No patent liability is assumed by Rockwell Automation, Inc. with respect to use of information, circuits, equipment, or software described in this manual.Reproduction of the contents of this manual, in whole or in part, without written permission of Rockwell Automation, Inc., is prohibited.Throughout this manual, when necessary, we use notes to make you aware of safety considerations.Allen-Bradley, RSLogix, RSLogix 5000, RSView, RSLinxRSNetworx, DH+, PanelView, PanelViewPlus, Rockwell Automation, TechConnect, and VersaView are trademarks of Rockwell Automation, Inc.Trademarks not belonging to Rockwell Automation are property of their respective companies.WARNINGIdentifies information about practices or circumstances that can cause an explosion in a hazardous environment, which may lead to personal injury or death, property damage, or economic loss.IMPORTANTIdentifies information that is critical for successful application and understanding of the product.ATTENTIONIdentifies information about practices or circumstances that can lead to: personal injury or death, property damage, or economic loss. Attentions help you identify a hazard, avoid a hazard, and recognize the consequenceSHOCK HAZARDLabels may be on or inside the equipment, for example, a drive or motor, to alert people that dangerous voltage may be present.BURN HAZARDLabels may be on or inside the equipment, for example, a drive or motor, to alert people that surfaces may reach dangerous temperatures.3Publication 1756-UM523F-EN-P - December 2006Summary of ChangesIntroductionThis release of this document contains new and updated information. To find new and updated information, look for change bars, as shown next to this paragraph.Updated InformationThe document contains these changes.TopicPageSeries E information for 1756-CNB and -CNBR modulesThroughout manualRedundant System Firmware Combinations14Revised Procedure for Setting the Minimum Value for the Watchdog Time100Restrictions and Known AnomaliesAppendix EUpdate an Online Redundant System138Store a Project to Nonvolatile Memory While Process Is Running128Change CNB Modules from Series D to Series E While Online129Publication 1756-UM523F-EN-P - December 2006Summary of Changes 4Notes:5Publication 1756-UM523F-EN-P - December 2006Table of ContentsPrefacePurpose of this Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11Who Should Use this Manual. . . . . . . . . . . . . . . . . . . . . . . . 11When to Use This Manual. . . . . . . . . . . . . . . . . . . . . . . . . . 11How to Use this Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . 11Related Documentation. . . . . . . . . . . . . . . . . . . . . . . . . . . . 12Chapter 1ControlLogix Redundancy System OverviewIntroduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13About the Main Parts of a Redundant System. . . . . . . . . . . . 14Firmware Combinations That Make Up a Redundant System. 14Important Terms in a Redundant System . . . . . . . . . . . . . . . 15Primary Chassis. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15Switching from One Controller to Another. . . . . . . . . . . . . . 15Network Access Port. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16Bump in Outputs During a Switchover. . . . . . . . . . . . . . . . . 16Keep the Second Controller Up to Date. . . . . . . . . . . . . . . . 16Making Online Edits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18Increasing Scan Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18Network Addresses During a Switchover . . . . . . . . . . . . . . . 18ControlNet Network. . . . . . . . . . . . . . . . . . . . . . . . . . . . 19EtherNet/IP Network . . . . . . . . . . . . . . . . . . . . . . . . . . . 20Quick Start Checklists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21Chapter 2Design the SystemIntroduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27Laying Out the System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28Placement of a Pair of Redundant Chassis . . . . . . . . . . . . . . 30If You Need More Than 100 Meters Between Chassis . . . 30Placement of the I/O. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31Placement of Operator Interface Terminals. . . . . . . . . . . . . . 32Additional Redundant Components . . . . . . . . . . . . . . . . . . . 33Redundant ControlNet Media. . . . . . . . . . . . . . . . . . . . . 33Redundant Power Supplies. . . . . . . . . . . . . . . . . . . . . . . 34Checking Connection Requirements. . . . . . . . . . . . . . . . . . . 35Planning a ControlNet Network. . . . . . . . . . . . . . . . . . . . . . 35Planning an EtherNet/IP Network . . . . . . . . . . . . . . . . . . . . 38Worksheet for IP Swapping . . . . . . . . . . . . . . . . . . . . . . 39How an EtherNet/IP Module Handles a Cable Break. . . . 40Additional Design Considerations . . . . . . . . . . . . . . . . . . . . 41Chapter 3Install the SystemIntroduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43Preliminary Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . 43Install the Chassis for the Controllers. . . . . . . . . . . . . . . . . . 45Install Modules in the First Redundant Chassis. . . . . . . . . . . 46Install Modules in the Second Redundant Chassis. . . . . . . . . 48

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